Answer / sudhanva

If the angle between current phasor and voltage phasor becomes equal to zero then such circuits are called pure resistive and if that angle becomes equal to 90 , it is pure inductive and if the angle becomes -90 , it is pure capacitive. Here current phasor is taken as reference..

In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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What id difference between power and energy?

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What is meant by locking of rotor in synchronous motor? Explain me locking in detail?

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In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

0 Answers   Saint Gobain,

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Define what is the function of anti-pumping in circuit breaker?

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How to select KW/HP rating of motor for particular application? Is there any relationship od RPM?

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what is the purpose of using filters in a protective relaying scheme?

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What is Grounding?

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we have one ups its neutral is not earthed.its one distribution MCB has a earth fault.but we can not put off any MCB.so how to find out that in which circuit is earthed without isolating the breaker.

3 Answers   CFCL,

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what is meaning volt-hz ration,where is necessry tomaintain and why. specialy during increase the power of generator.

3 Answers  

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In a three phase transformer(delta/star connected)when i touch one end of the bulb in any one phase and other end to earth..will the bulb glow or not..if not why?..i'm touching the bulb in star connected side...

6 Answers  

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What is making & breaking current ???

0 Answers   JLL,

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